Method of uniting warps



Dec. 22, 1964 H. JOHN 3,161,941

METHOD OF UNITING WARPS Filed Nov. 28. 1960 2 Sheets-Sheet l L E? o W MW W INVENTOR H EINZ 30H N YfiM,W

' A1 ORNEVS Fig. 3

Dec. 22, 1964 H. JOHN METHOD OF UNITING WARPS 2 Sheets-Sheet 2 Filed Nov. 28, 1960 Fig. 4

INVENTOR H EINZ J'OHN ATTO RNEYS United States Patent 3,161,941 METHOD OF UNITENG WARPS Heinz John, Uzwil, Switzerland, assignor to Maschiuenfabrik Benninger A.-G., Uzwil, Switzerland Filed Nov. 28, 1969, Ser. No. 72,183 1 Claim. (Cl. 28-725) The knotting or tying of two warps is carried out by hand and by means of warp tying machines. Starting with the outerthreads of the old warp and of the next new warp, thread after thread is seized from a lease of one Warp and then tied with the corresponding opposite thread of the other Warp.

When drawing a warp by hand into the harness the threads of the warp are seized in the correct order and drawn in by means of a threading needle or heddle hook through the heddle eyelets. Following the drawing-in into all heddles, the threads, in a second working operation, are reeded into the weaving reed, again by means of a threading needle. Finally, in a third working operation, the drop wires are separately hooked onto each warp thread.

The drawing-in of a warp by means of fully automatic machines is effected by a method in which, beginning from the outer end of a warp, thread after thread is taken from the lease of one warp by a worm, separated from the lease and brought into working position. Simultaneously a drop wire and the corresponding heddle is separated by a punched card control from the remaining drop wires and heddles and also brought into working position. A threading needle or heddle hook is guided through the corresponding reed gap, the selection of which is also effected by the punched card control, passes through the heddle and drop wire in the working position and seizes the thread associated therewith. On the return stroke the thread is drawn in through the drop wire, through the heddle and through the weaving reed, after which the drop wire and the heddle with the drawn in thread are moved by worms out of the working range of the threading needle and the same operation is repeated for the next thread.

The latter system requires very complicated mechanisms in order to seize the warps in the correct order. A further diffieulty which arises is that time yarns closely spaced as well as coarse yarns with greater spaces between them must be handled by the same machine. Additionally due to the differences among various textile materials, the warp tying machines requires different tools for different yarn types.

Considering the varying thread spacings and the differences among the threads with respect to their strength and composition it is very diflicult to seize thread after thread in the correct order. None of the safety devices in existing machines correct faults already present, so that these faults are carried over to the new warp unchanged resulting in incorrectly woven material and often leading to the necessity of repeating the whole drawing-in operation. Other, more recent machines may at the best stop the machine if such a fault is detected. Even more unpleasant are double threads. If a machine once ties a double thread or if two threads instead of one are drawn in through the harness, the next following thread is forcibly drawn in through the wrong heddle and consequently is passed through the wrong reed gap, and the same thing happens with all subsequent threads which for multicolored warps re quires a repetition of the whole knotting and drawing-in operation.

Consequently the afore-described machine can be attended by skilled workers only, and moreover, the adjusting and maintenance of the machine are not easy. In addition thereto the preliminary work very often takes 3,161,941 Patented Dec. 22, 1964 more time than the actual operation of the machine itself.

The present invention has for its object the provision of a method by which the dilferent working steps are simplified, simultaneously making the working means less expensive and excluding all possibilities of faults while still saving [time as compared with heretofore known systems.

To this end the present invention contemplates a method for fixing in a predeterminated relative position the threads of a thread layer, according to which the thread layer is arranged in a plane and the threads are positioned in this plane in the relative positions in which they are to be fixed and thereafter the threads are fixed in their relative positions by aholding means extending transversely or crosswise of the thread layer.

Other features and advantages of the invention shall become apparent from the following description of two preferred embodiments thereof, given by way of example only, and in which reference will be made to the accompanying diagrammatical drawings, in which:

FIGURE 1 shows the warp threads extending from a creel to a warping machine,

FIGURE 2 is a plan view of FIGURE 1,

FIGURE 3 is a section through a lease reed,

FIGURE 4 shows the drawing-in of a warp into the heddles and the drop wires, and

FIGURE 5 shows the connection of two warps.

As shown in FIGURE 1 of the accompanying drawing in the normal Warping process a plurality of Warp threads 1 are drawn off the creel 2 then passed through the lease reed 3 of a leasing device 4 and a spacing or guide reed S in order that it can be wound up in the form of a warp sheet or band6 onto the cylinder 7 of a warping machine 8. The warp threads 1 are drawnin through the lease reed 3 (FIGURE 2) in such manner that only one thread is passed through each dent 9 thereof while in the spacing reed 5, according to the spacing of the warp threads (number of threads per centimeter), one, two or more threads pass through each dent. From FIGURES l and 2 it is clearly visible that the constant spacing between the threads in the lease reed 3 is diminished as necessitated by the reduced width of the warp sheet 6 as compared with the width of the lease reed. The number of threads per centimeter in the warp sheet 6 is determined by the angle of the spacing reed 5, which of course widely varies for different fabrics.

The novel method maintains the order present in the lease reed 3 in such manner that this order may be used for further operations in the machine for the connection of two warps, or for drawing-in a warp into the harness of a loom. The lease reed 3 (FIG. 3) is provided with a fixed number of dents 9 depending on the number of bobbins in the creel 2 and with a constant width 11 resulting in a constant spacing 11, of the threads 1. In order to maintain this constant division 11, i.e. in order to fix the warp threads in their relative position with respect to each other, holding means 12 are arranged at the beginning and at the end of each warp thread sheet 6, which means 12 extend transversely to the thread layer and thereby fix the warp threads of the sheet 6 in the arrangement or spacing 11. In FIGURE 4 the holding means 12 are represented as formed by adhesive tapes. These tapes are preferably made of unextensible material and of such flexibility that they may be folded down to the width of the sheet or band 6. The holding means 12 may also be constituted by flexible bands of synthetic material welded to the warp threads 1 in order to fix the spacing 11 thereof. On the warping cylinder 7 the beginning and the end of the sheet 6 is secured with the flexible tapes 12 as usual.

The winding up of the warp onto the warp beam is effected with the flexible tapes 12 folded to the width of the warp sheet 6 and secured in a conventional manner.

-In order to place a beam wanpe'l in the described manner on a loom the warp threads 1 (FIG. 4) of a sheet 6 unfolded to the width 10 of the lease reed are drawnin in one operation through the conventional drop Wires 15 of the loom stops motion on the rails 16 and through the eyelets 18 of the heddles 13. Due to the positive position with respect to spacing and order of the warp threads on the tape 12 it is possible to associate thereto the corresponding heddle eyelet and drop wire 15 so that, for example, grippers or needles quided in grooved rails 14 may seize each associated thread 1 and that after mechanically cutting away the tape 12 the warp threads are free and ready to be drawndn.

This method according to which several warp threads may he drawn-in simultaneously and in one Working operation advantageously replaces the heretofore known and used draw-in machines which engage the threads separately one after the other.

As soon as a warp drawn-in as described is utilized in the loom, the next warp may either be drawn-in similarly if the same type of draw-in is used, and as represented in FIGURE 5, the tape 12' of the used up sheet 6' may be connected with the tape" of the new sheet 6" so that the warp threads 1' correspond with the warp threads 1". By means of a cutting device the thus connected holding tapes 12 and 12" may be separated at 17 in order that the thus connected warp sheet may be passed through the harness and the weaving reed.

By the described method all knetting or tying maempty adter the drawing-in, and an incorrect drawing-in is impossible.

In addition to the adhesive tapes or to bands of synthetic materials, other holding means may be utilized for fixing the threads of a thread layer in their relative positions with respect to each other.

For example, the threads may be pressed into a tough, hardenable mass. For connecting two warps it is also possible to place the ends of the worked up sheet and the beginning of a new sheet both fixed by holding means over a thread dividing device, for example over a comb or a rack, whereby the spaces are adjusted to the spacing 11 and thereafter to glue or otherwise connect with each other the two bands or sheets. The ends with the holding means may then be removed and the new warp may be drawn-in continuously.

I claim:

A method of uniting two groups of unwoven threads with the threads in each group disposed parallel to each other and which threads are adapted to be guided through a lease reed at one spacing of the parallel threads and afterwards with smaller spacing through a guide reed of a textile machine, said method comprising the steps of applying a non-extensible, flexible adhesive tape to paired threads, said paired threads consisting of a thread from each group, said tape being applied when the threads are near the lease reed the respective pairs of threads being spaced from adjacent pairs, and severing the tape between adjacent pairs of threads.

References Cited by the Examiner UNITED STATES PATENTS 1,986,974 1/35 Kellogg 28-47 2,537,007 1/ 51 Abbott 2847 2,585,708 2/52 Welch 28-47 FOREIGN PATENTS 3,177 of/67 Great Britain.

MERVIN STEIN, Primary Examiner. 

